$100/door cash flow question

[Michael C.]

So I have seen many references to people wanting to cash flow $100 per door on a property they are investing in.  Sounds to me like a reasonable and achievable goal.  However, I keep feeling like there is a component missing here that I haven't heard addressed and that is the notion of what you had to put into the property.  Maybe if you have it 100% financed this doesn't matter.  But if you have say 20% of your own money in the property it feels like I am missing the notion of cash on cash return.  If your upfront investment of cash out of your pocket is say $1million for one unit, getting $100 would be a terrible investment.  Now obviously that is an extreme and ridiculous situation that (I hope) nobody would ever do, but it still feel to me like if you say $100 per door, it should be with a cost basis or a cash out of pocket per door of $X.  Need some notion of relative value.

If that's right, what do people usually target as $X?  Or am I just mixing and matching concepts and off in the woods?

Thanks for your feedback.